Carrier NP034-074 User Manual

Page 47

25% OUTDOOR-AIR DAMPER — See Manual Outdoor-
Air Damper section on page 10 for adjustment details.

REFRIGERANT CHARGE — All units are shipped with a
complete operating charge of R-22. See unit nameplate and
Tables 1A and 1B for amount of charge. When adding a com-
plete charge, evacuate system using standard evacuating pro-
cedures and weigh in the specified amount of charge. All
units have charging charts for each refrigerant circuit. See
Fig. 46-59.

PILOT LIGHT OFF (48NP Units Only) — If pilots do not
light as described in Heating section on page 41, be sure that
pilot orifice is unobstructed, then check for spark ignitor mal-
functions as follows:
1. Turn off the control circuit breaker (CCB) to shut off con-

trol supply power to ignitor control pack (ICP).

2. Check that spark gap is

⁄

in.

⁄

inch.

3. Check that ICP is securely grounded.
4. Check that the high-voltage lead is securely connected

between the ICP and the electrode body.

5. Turn on CCB to restore power to ICP. Check that 24 v is

supplied to terminal TH of the ICP.

6. Check unit label diagram for correct terminal usage if any

wires are removed.

Fig. 45 — Pulley Alignment

Fig. 46 — Charging Chart, 034 Units; System 1,

One Condenser Fan Running

Fig. 47 — Charging Chart, 034 Units; System 1,

All Condenser Fans Running

Fig. 48 — Charging Chart, 034 Units; System 2,

One Condenser Fan Running